make kind on action install configurable (#317)

diff --git a/installCatalog.sh b/installCatalog.sh
index 552619e..d73d02c 100755
--- a/installCatalog.sh
+++ b/installCatalog.sh
@@ -25,6 +25,7 @@
 APIHOST="$5"
 WORKERS="$6"
 INSTALL_PRODUCE_ACTION=${INSTALL_PRODUCE_ACTION:="true"}
+ACTION_RUNTIME_VERSION=${ACTION_RUNTIME_VERSION:="nodejs:6"}
 
 # If the auth key file exists, read the key in the file. Otherwise, take the
 # first argument as the key itself.
@@ -60,7 +61,7 @@
 cp -f messageHubFeed_package.json package.json
 zip -r messageHubFeed.zip lib package.json messageHubFeed.js
 
-$WSK_CLI -i --apihost "$EDGEHOST" action update --kind nodejs:6 messaging/messageHubFeed "$PACKAGE_HOME/action/messageHubFeed.zip" \
+$WSK_CLI -i --apihost "$EDGEHOST" action update --kind "$ACTION_RUNTIME_VERSION" messaging/messageHubFeed "$PACKAGE_HOME/action/messageHubFeed.zip" \
     --auth "$AUTH" \
     -a feed true \
     -a description 'Feed to list to Message Hub messages' \
@@ -100,7 +101,7 @@
 cd $OLD_PATH
 
 
-$WSK_CLI -i --apihost "$EDGEHOST" action update --kind nodejs:6 messagingWeb/messageHubFeedWeb "$PACKAGE_HOME/action/messageHubFeedWeb.zip" \
+$WSK_CLI -i --apihost "$EDGEHOST" action update --kind "$ACTION_RUNTIME_VERSION" messagingWeb/messageHubFeedWeb "$PACKAGE_HOME/action/messageHubFeedWeb.zip" \
     --auth "$AUTH" \
     --web true \
     -a description 'Write a new trigger to MH provider DB' \